ABAP Select data from SAP table REXCESIBIINSTLMNT into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP REXCESIBIINSTLMNT table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to REXCESIBIINSTLMNT. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the REXCESIBIINSTLMNT table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_REXCESIBIINSTLMNT TYPE STANDARD TABLE OF REXCESIBIINSTLMNT,
      WA_REXCESIBIINSTLMNT TYPE REXCESIBIINSTLMNT,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <REXCESIBIINSTLMNT> TYPE REXCESIBIINSTLMNT.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_REXCESIBIINSTLMNT.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM REXCESIBIINSTLMNT
  INTO TABLE IT_REXCESIBIINSTLMNT.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REXCESIBIINSTLMNT
*  INTO TABLE @DATA(IT_REXCESIBIINSTLMNT2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_REXCESIBIINSTLMNT INDEX 1 INTO DATA(WA_REXCESIBIINSTLMNT2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_REXCESIBIINSTLMNT ASSIGNING <REXCESIBIINSTLMNT>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REXCESIBIINSTLMNT>-INSTDATE1 = 1.
<REXCESIBIINSTLMNT>-INSTAMOUNT1 = 1.
<REXCESIBIINSTLMNT>-INSTDATE2 = 1.
<REXCESIBIINSTLMNT>-INSTAMOUNT2 = 1.
<REXCESIBIINSTLMNT>-INSTDATE3 = 1.

ENDLOOP.

LOOP AT IT_REXCESIBIINSTLMNT INTO WA_REXCESIBIINSTLMNT.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REXCESIBIINSTLMNT-INSTAMOUNT3, sy-vline,
  WA_REXCESIBIINSTLMNT-INSTDATE4, sy-vline,
  WA_REXCESIBIINSTLMNT-INSTAMOUNT4, sy-vline,
  WA_REXCESIBIINSTLMNT-INSTDATE5, sy-vline,
  WA_REXCESIBIINSTLMNT-INSTAMOUNT5, sy-vline,
  WA_REXCESIBIINSTLMNT-INSTDATE6, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REXCESIBIINSTLMNT you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_REXCESIBIINSTLMNT TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_REXCESIBIINSTLMNT INTO WA_REXCESIBIINSTLMNT.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_REXCESIBIINSTLMNT_STR, 
INSTDATE1 TYPE STRING,
INSTAMOUNT1 TYPE STRING,
INSTDATE2 TYPE STRING,
INSTAMOUNT2 TYPE STRING,
INSTDATE3 TYPE STRING,
INSTAMOUNT3 TYPE STRING,
INSTDATE4 TYPE STRING,
INSTAMOUNT4 TYPE STRING,
INSTDATE5 TYPE STRING,
INSTAMOUNT5 TYPE STRING,
INSTDATE6 TYPE STRING,
INSTAMOUNT6 TYPE STRING,
INSTDATE7 TYPE STRING,
INSTAMOUNT7 TYPE STRING,
INSTDATE8 TYPE STRING,
INSTAMOUNT8 TYPE STRING,
INSTDATE9 TYPE STRING,
INSTAMOUNT9 TYPE STRING,
INSTDATE10 TYPE STRING,
INSTAMOUNT10 TYPE STRING,
INSTDATE11 TYPE STRING,
INSTAMOUNT11 TYPE STRING,
INSTDATE12 TYPE STRING,
INSTAMOUNT12 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REXCESIBIINSTLMNT_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_REXCESIBIINSTLMNT_STR-INSTDATE1 sy-vline 
WA_REXCESIBIINSTLMNT_STR-INSTAMOUNT1 sy-vline 
WA_REXCESIBIINSTLMNT_STR-INSTDATE2 sy-vline 
WA_REXCESIBIINSTLMNT_STR-INSTAMOUNT2 sy-vline 
WA_REXCESIBIINSTLMNT_STR-INSTDATE3 sy-vline 
WA_REXCESIBIINSTLMNT_STR-INSTAMOUNT3 sy-vline 
WA_REXCESIBIINSTLMNT_STR-INSTDATE4 sy-vline 
WA_REXCESIBIINSTLMNT_STR-INSTAMOUNT4 sy-vline 
WA_REXCESIBIINSTLMNT_STR-INSTDATE5 sy-vline 
WA_REXCESIBIINSTLMNT_STR-INSTAMOUNT5 sy-vline 
WA_REXCESIBIINSTLMNT_STR-INSTDATE6 sy-vline 
WA_REXCESIBIINSTLMNT_STR-INSTAMOUNT6 sy-vline 
WA_REXCESIBIINSTLMNT_STR-INSTDATE7 sy-vline 
WA_REXCESIBIINSTLMNT_STR-INSTAMOUNT7 sy-vline 
WA_REXCESIBIINSTLMNT_STR-INSTDATE8 sy-vline 
WA_REXCESIBIINSTLMNT_STR-INSTAMOUNT8 sy-vline 
WA_REXCESIBIINSTLMNT_STR-INSTDATE9 sy-vline 
WA_REXCESIBIINSTLMNT_STR-INSTAMOUNT9 sy-vline 
WA_REXCESIBIINSTLMNT_STR-INSTDATE10 sy-vline 
WA_REXCESIBIINSTLMNT_STR-INSTAMOUNT10 sy-vline 
WA_REXCESIBIINSTLMNT_STR-INSTDATE11 sy-vline 
WA_REXCESIBIINSTLMNT_STR-INSTAMOUNT11 sy-vline 
WA_REXCESIBIINSTLMNT_STR-INSTDATE12 sy-vline 
WA_REXCESIBIINSTLMNT_STR-INSTAMOUNT12 sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.